Unlock instant, AI-driven research and patent intelligence for your innovation.

Protection method and device for shutting down of a hydraulic unit due to vibration accidents

A hydraulic unit, accident shutdown technology, applied in the direction of machines/engines, safety devices, hydroelectric power generation, etc., can solve the problems of ineffective implementation of unit mechanical vibration accident shutdown protection, waste of manpower, material resources and resources, malfunction shutdown, etc., to achieve accurate Effective safety protection, reducing the loss of downtime, and avoiding the effect of measurement misjudgment

Active Publication Date: 2020-08-04
SICHUAN YITIAN JIQUN TECH
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the object of the present invention is to provide a method and device for protecting a hydraulic unit from a vibration accident shutdown, which can obtain and judge the vibration jump value of the first measuring point first, and the vibration jump value at the first measuring point When the value is abnormal, obtain and judge the vibration jump value of the second measuring point, and determine whether the vibration jump protection of the hydraulic unit needs to be shut down according to the abnormality of the vibration jump value of the second measuring point, which solves the current various problems The vibration monitoring device of the hydraulic unit not only cannot effectively implement the mechanical vibration accident shutdown protection of the unit, but also leads to misjudgment of measurement, malfunction shutdown, waste of manpower, material resources and resources

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Protection method and device for shutting down of a hydraulic unit due to vibration accidents
  • Protection method and device for shutting down of a hydraulic unit due to vibration accidents
  • Protection method and device for shutting down of a hydraulic unit due to vibration accidents

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0028] Please refer to figure 1 , figure 1 This is a flowchart of a method for protecting a hydropower unit from a vibration accident shutdown according to the first embodiment of the present invention. The method specifically includes the following steps:

[0029] Step S110: Obtain a first vibration jump value of a first measuring point of a hydraulic unit.

[0030] The basic principle of hydroelectric power generation is to use the water level drop to cooperate with the water turbine generator to generate electricity, that is, use the potential energy of water to convert the mechanical energy of the water wheel, and then use the mechanical energy to drive the generator to obtain electricity. The hydraulic unit in this embodiment is a hydraulic generator, and the hydraulic unit is composed of main components such as a rotor, a stator, a frame, a bearing, a cooler, and a brake. The structure of the hydraulic unit is complex, and its faults often appear on the rotor, bearing and oth...

no. 2 example

[0046] Please refer to figure 2 , figure 2 This is a flowchart of a method for protecting a hydropower unit from a vibration accident shutdown according to the second embodiment of the present invention. The method specifically includes the following steps:

[0047] Step S210: Obtain the vibration jump value of each measuring point of the hydraulic unit.

[0048] The vibration jump value of each measuring point is obtained by sensors installed in different bearing parts of the hydraulic unit and sensors in different positions of the same bearing part.

[0049] Step S220: Determine the first measuring point.

[0050] Before determining the first measuring point, step S220 further includes: setting the preset safety threshold corresponding to each measuring point according to the vibration characteristics of each measuring point when the hydraulic unit is in a normal operating state.

[0051] The specific method for determining the first measuring point is: when the vibration jump value...

no. 3 example

[0063] In order to realize the above-mentioned protection method for the shutdown of a hydraulic unit due to a vibration accident, the third embodiment of the present invention provides a protection device 100 for a shutdown of a hydraulic unit due to a vibration accident. Please refer to image 3 , image 3 It is a schematic diagram of a module of a protection device for a vibration accident shutdown of a hydraulic unit provided by the third embodiment of the present invention. The protection device 100 for a vibration accident shutdown protection of a hydraulic unit includes: a first acquisition unit 110, a second acquisition unit 120, and a first judgment unit 130. The second judgment unit 140 and the protection unit 150.

[0064] The first obtaining unit 110 is configured to obtain a first vibration jump value of a first measuring point of a hydraulic unit.

[0065] The second acquiring unit 120 is configured to acquire a second vibration jump value of a second measuring point r...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a water power set vibration accident shutdown protection method and device, and belongs to the technical field of hydroelectric generation. The water power set vibration accident shutdown protection method includes the steps that a first vibration jump value of a first measuring point of a water power set is acquired at first; whether the first vibration jump value exceedsa first preset safety threshold value or not is judged; when the first vibration jump value exceeds the first preset safety threshold value, a second vibration jump value of a second measuring pointrelated to the first measuring point is acquired and whether the second vibration jump value exceeds a second preset safety threshold value or not is judged; and if yes, the water power set is subjected to vibration accident shutdown. According to the water power set vibration accident shutdown protection method and device, whether the water power set is subjected to shutdown protection or not isjudged based on the vibration jump values of the first measuring point and the second measuring point as well as the safety threshold values, erroneous judgment shutdown can be avoided while mechanical vibrations of the water power set are effectively prevented, the safety protection level of set accident vibrations is increased and the vibration accident shutdown reliability is improved.

Description

Technical field [0001] The invention relates to the technical field of hydroelectric power generation, and in particular to a method and device for protecting a hydropower unit from a vibration accident shutdown. Background technique [0002] As society’s demand for electricity increases and people’s awareness of environmental protection increases, the importance of hydropower has gradually increased. China's river hydropower reserves are 676 million kW, with an annual power generation capacity of 5.920 billion kWh; the installed capacity of possible hydropower resources is 378 million kW, and the annual power generation capacity is 1,920 billion kWh. Regardless of the amount of hydropower resources, or the hydropower resources that may be developed, China ranks first in the world. [0003] While the scale of hydroelectric power generation is rapidly expanding, ensuring the safe and stable operation of hydropower units in hydropower stations has also become a top priority. However...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): F03B11/00F03B15/00
CPCF03B11/008F03B15/00F05B2270/334Y02E10/20
Inventor 赵国建何军先嘉吴博张贤春
Owner SICHUAN YITIAN JIQUN TECH